Heating-furnace.



No. 887,866. PATENTED MAY 19, 1908.

V W. T. STEWART.

HEATING FURNACE.

APPLIOATIONAPILBD OCT. 27, 1906. BENEWED OOT. 25, 1907.

ATTOHNEY wTNEEEEE:

mwa/4% WILLIAM T. STEWART,

OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JOHN W. PARKER, OF PITTSBURG, PENNSYLVANIA.

HE ATING-FURNACE .No. 887,8e6.

Application filed October 27, 1906, Serial No. 340317. Renewed October 25, 1907.

To all whom it may conccm: e

Be it known that I, WILLIAM T. STEWART, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Heating- Furnaces; and I do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to certain new and useful improvements in heating furnaces employing gas as a heating medium, my idea being to provide a furnace that will be adapted to hang from the rafters in the cellar, or be positioned in any other suitable place, and have registers connected therewith for introducing the heat into any desired part of the house.

My invention further has for its object the Construction of a heating furnace wherein a more perfect mixing and combustion of the gas and air will be had, likewise a means for filtering the heat produced by said combustion and purifying the same before it passes into the room.

In the accornpanying drawing I have shown two views of my invention, Figure 1 being a vertical sectional View of my heatin device as Suspended from the rafters and Fig. 2 is a detached view of a cross-shaped or four-way miXing device.

Throughout the drawing the numeral l designates the shell or body portion of my improved heater preferably made in a conical shape, as shown, but other forms may be substituted if desired. The shell is Suspended by means of suitable straps 2 from the rafters 3-3, the upper portion of the heater entering a register boX 4. A suitable door 5 is provided at any desired part of the shell 1.

Entering the lower end of the shell 1, which may be entirely open or partially closed, is a mixer 6 having a plurality of preferably bellshaped inlet orifices 7-7. The air enterng through these orifices converges in the center and there miXes with the gas enterng said mixer through a tapered nozzle 8, which in turn communicates with a valve controlled supply pipe 9. Secured to the top of said mixer 6 is a combus'tion chamber 10 having Specificaton of Letters Patent.

Patented May 19, 1908.

Serial No. 399,194.

inclined walls, as shown, in which compartment the air and gas become thoroughly amalgamated, due to a swirling motion iven the same by deflection against said inc ined walls, and is then ready to be ignited. On the top of this chamber 10 is a perforated or screened outlet opening 10' and it is at this point where the ignition takes place; the gas burning with a perfectly blue fiame.

Sus ended on the inside of the furnace by suitab e means is a receptacle 12 preferably made conical in form and having the lower or narrowest end a slight distance above the perforated opening in the combustion chamber 10. The outside and likewise inside walls of this receptacle 12 are intended to be covered with a coating of asbestos cement for the purpose of preserving the metal against rust or decomposition, and the receptacle itself is designed and intended to contain a supply of lime 13 or other purifying material; the utility of which will be more fully set forth hereinafter. At a point, about midway of the length of this receptacle 12, and eXtending around the entire circumference of the furnace in close l proXimity to the walls of the shell 1 and receptacle 12, is a perforated battle plate or mesh 14 both the upper and lower sides of which are covered with asbestos fiber or other non-inflammable substance. The primary object of this re-inforced perforated baifle plate is to filter the products of combustion and air that enters through the bottom of the furnace in order that the heated air as it passes on up into the register will be practically free from dust or other deleterious substances. As a means for thoroughly purifying this heated air before it passes out of the furnace, I have provided the receptacle 12 which is intended to contain a supply of lime, or other purifying material and when this lime becomes heated, the fumes arising therefrom will permeate the heated air being filtered through the asbestos lined baffie plate 14 and the results of this combination of heated air and lime fumes will render the air passing into the compartments above as ure as it is possible to make it, and free from any injurious or obnoXious odors.

The perfect combustion aflorded by the thorough miXing of the air and gas in the chamber 10 will to a great eXtent lesson the possibilities of any gas fumes escaping up- 2 &87,866

ward, after being ign'ted on the erforated I the form of an inverted cone and having its top 10' of said chamber, and any 'umes that edge terminating a distance away from the mght arise Will be retarded as the heated shell and a baffie plat'e interposed between air filters through the screen 14. the shell and the receptacle.

5 Having thus fully shown and described In testimony whereof, I affix my signamy invention, what I claim as new, and ture, in presence of two witnesses.

desire to secure by Letters Patent is: WILLIAM T. STEWART.

In combnation, a shell, a mixer within; Witnesses: the shell, a receptacle carried by the shell ALICE A. TRILL,

o above the mixer, said receptacle being in J. P. APPLEMAN. 

